How can array_walk() be used to iterate through elements and delete empty elements in PHP?

To iterate through elements and delete empty elements in PHP using array_walk(), you can define a callback function that checks if the element is empty and then unset it if it is. This can be achieved by using the array_walk() function with the callback function as a parameter. 

// Define the array with empty elements
$array = array("apple", "", "banana", "", "cherry");

// Define the callback function to unset empty elements
function removeEmptyElements(&$value, $key) {
    if(empty($value)) {
        unset($value);
    }
}

// Iterate through the array and remove empty elements
array_walk($array, 'removeEmptyElements');

// Output the updated array without empty elements
print_r($array);

Keywords

array_walk iterate delete empty elements PHP

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